INSECTS 



sweeping, only one species, Ccecilius pedicularius, Linn., being taken also 

 on the wing. The genus Psocus is represented by Ps. longicornis, Fabr., 

 recorded from Mickleham and Box Hill (Ashdown) ; Ps. nebulosus, Steph., 

 from Leatherhead (Ashdown) and Bookham Common (Briggs) ; Ps. 

 fasciatus, Fabr., from Cobham and Ockham Common (Briggs) ; Ps. sex- 

 punctatus, Linn., from Leatherhead (Ashdown) ; Ps. major, Kolbe, from 

 Bookham Common (Briggs). Stenopsocus immaculatus, Steph., has been 

 recorded from Wisley and Leatherhead (Briggs) ; St. stigmaticus, Imhoff, 

 from Reigate and near Chertsey (McLachlan) ; St. cruct'atus, Linn., 

 near Ranmore (Lucas) and Leatherhead (Briggs). Caecilius pedicularius, 

 Linn., is frequent in houses, especially on windows, but occasionally flies 

 in bright sunshine in great numbers ; C.Jtavidus, Steph., near Ranmore 

 (Lucas), Bookham Common (Briggs) ; C. atricornis, McLach., Chertsey 

 Bridge (McLachlan) ; C. da/ii, McLach., from Weybridge (King) ; and 

 C. piceus, Kolbe, Box Hill (King). Peripsocus alboguttatus, Dalm., was 

 beaten in some numbers from heath at Weybridge in 1873, but does 

 not seem to have been taken since. Elipsocus unipunctatus, Mull., occurs 

 at Bookham Common (Briggs) and Esher Common (Lucas) ; E. west- 

 woodii, McLach., and its variety, abietis, Kolbe, is not uncommon round 

 Leatherhead ; E. Jlaviceps occurs sparingly at Bookham Common 

 (Briggs) ; and E. cyanops, Rost., is found at Leith Hill. 



Another much neglected group, the Per/ida, seems to have been 

 very little worked in the county, and records are practically non-existent. 

 Dictyopteryx microcephala, Pict., is found on the Thames in spring. 

 Chloroperla grammatica, Poda, occurs along the banks of the Mole in the 

 Leatherhead district, where also Isopteryx tripunctata. Scop., and I. torren- 

 tium, Pict., are common. Leuctra fusciventris, Steph., is common in 

 suitable localities ; L. geniculata, Steph., is found on the Thames. 

 Nemoura variegata, Oliv., occurs in profusion at Wisley Pond, Esher, 

 Byfleet, Bookham Common, etc. ; j!V. meyeri, Pict., is found sparingly at 

 Leatherhead, Bookham Common, etc. ; a solitary specimen of N. avicu- 

 laris, Morton, was whipped off a reed in the canal at Byfleet ; and N. 

 inconspicua, Pict., has been taken (Lucas) at Esher in May and Sep- 

 tember. The Ephemeridce, the third of the ' neglected ' groups, has been but 

 little more worked or recorded than the others. Ephemera vu/gata, Linn., 

 and E. danica, Mull. the May-flies par excellence of anglers are of course 

 in the utmost profusion, though not often together, the former requiring 

 warmer water temperature than the latter. The scarce E. /ineata, Eatn., 

 has been taken near Kingston-on-Thames in 1901 (Lucas). Potamanthus 

 /uteus, Linn., has occurred at Weybridge (McLachlan). Leptopblebia 

 submarginata, Steph., is not uncommon at the White Falls Leatherhead 

 (Briggs) and Esher Common (Lucas), while L. marginata, L., occurs 

 at Byfleet Canal (Lucas). Habropblebia fusca, Curt., has been taken at 

 Newark Abbey, Box Hill and the White Falls, at which place also 

 Cam's dimidiata, Steph., Ephemerella ignita, Poda, BaStis vernus, Curt., B. 

 rt>odani,Pictet, Centroptilum pennulatum, Eatn., and Cloton rufu/um,Mu\L, also 

 occur. Centroptilum luteolum, Mull., at Esher (Lucas), CloHon simile, Eatn., 



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